Automatic cut-off.



A. A. CUMM|NGS.

AUTOMATIC CUT-OFF.

APPLICATION FILED DEC. 19, 1913.

1,140,666@ Patented May 25,1915.

mvautoz QLVQ A- cummngs Q/VH/ngooeo abtmmw ALVA A. CUMMINGS, OF DELAWARE, OKLAHOMA.

AUTOMATIC GUT-QFF.

Specification of Letters Yatent.

Patented Ma '25,'1915.

Application filed December 19, 1913. Serial No. 807,778.

To all whom it may concern:

Be it known that I, ALVA a citizen of the United States, reslding at Delaware, in the county of Nowata and State of Oklahoma, have invented certain new and useful Improvements in Automatic Cut- Oifs, of which the following is a specifica tion, reference being had to the accompanying drawings. 7 I

This invention relates to new and useful improvements in automatic cut offs and more particularly to a device of this character which is located outside of the storage tank at any suitable point and is to be disposed between the storage tank and the main supply pipe, the main object of the invention residing in the provision of a cut off which will automatically close after the liquid has end thereof concave,

been entirely drawn off from the storage tank whereby to prevent the entrance of air into the supply pipe.

' A further object f the invention is the provision of an automatic cut off'of the above character which will possess advantages in points of efliciency and durability, is inexpensive to manufacture and at the same time is simple in construction and operation. With the above and other objects in view,

the invention consists in the novel features of construction and the combination and arrangement of parts to be hereinafter more fully described, pointed out in the claim and shown in the accompanying drawings, in whichv Figure 1 is a side elevation of a storage tank and illustrating my improved cut ofi in vertical section; Fig. 2 is-a transverse sec tional view of the cut off taken on the line 2-2.of Fig. 1. Y

Referring more particularly to the drawings, 1 indicates a storage tank which is connected by means of a pipe 2 to my improved'cut off which may be located at a point adjacent the storagetank or at a point removed therefrom. The cut off itself includes an outer casing 3 which is substantially circular in cross section and the lower asshown at 4, and provided with a central opening 5 which communicates with the threaded nipple 6. The threaded nipple 6 is connected with the main supply pipe whereby the supply pipe will communicate with the interior of the casing. The casing 3 is provided upon one side thereof adjacent its upper end with an out- I A. CUMMINGS,

pp y p p wardly projecting nipple 8 upon which is V threaded the outer end of the connecting pipe 2, thus afl'ording communication between the storage tank 1. -The upper end of the casing 3 is provided with exterior [grasped to remove the cover or place the same upon the casing.

An annular valve seat 12 is disposed in the lower end of the casing to provide a suitable seat for the convex under surface of the valve 13 which is suspended from the lower end of the float 14. The float 14 is preferably formed of a hollow air tight metal casing and has a handle 15 whereby it may be readily removed through the upper open end of the casing. A downwardly projecting guide 16 is provided in the form of a rod which projects downwardly from the center of the valve 13 and is disposed within the opening 5 to readily guide the valve member 13 to its seat 12 upon the downward movement of the float 14.

In the construction of my improved automatic cut off the casing 3 is first connected with the main supply pipe 7, the storage tank is then connected with the casing 3 b having the pipe 2 connected with the threa ed nipple 8, thus providing communication between 17 is arranged in the connecting pipe whereby the supply fromthe storage tank may be readily cut oil? when desired to clean the easin 3. After'the casing 3 has been connected up with the storage tank and the main the float 14 is lowered into the casing through the upper open end thereof until the valve 13 is disposed upon the seat 12. The cover 10 of the casing is then closed and the cut oil is ready for use. 7

In the practical operation of my device, the: valve or gate 17 is opened allowing the contents of the storage tank 1 to pass into the casing 3 and as the casing 3 fills, the float 14 will rise and unseat the valve 13, allowing the contents of the casingto pass out through the opening 5 and into the supply pipe 7. After the supply of liquid in the screw threads adapted to engage with the the storage tank and the main 'supply pipe 7. A suitable globe valve or gate tank has almost entirely passed off into the supply pipe 7, the float 14 will drop and thus as soon as the casing is nearly emptied, the valve 13 will be reseated and prevent the admission of air into the main supply pipe.

In the practical use of my automatic cut ofi, it will be understood that the same is to be used upon the exterior of the storage tank and not upon the inside thereof as the cut offs in use at the present time thus permitting the casing to be opened and the valve removed for cleaning whenever neces sary. It may be further pointed out that the convex under face of the valve 13 fits the concave seat 12 so that tipping move ment of the float will not disengage the contacting face of the valve seat and thus permit the entrance of air into the supply pipe. It will also be apparent that I have provided a simple and durable device .of the above character which will automatically close after the liquid in the tank has been drawn off from the tank. The device itself is extremely simple in construction and can be manufactured and placed upon the market ata comparatively small cost.

While I have shown and described the preferred form of my invention, it will be obvious that various changes in the details any of the novel features or departing from the scope of the appended claim.

What I claim is The combination with a storage tank and a supply pipe, of an exterior valve casing disposed between the storage tank and supply pipe, said valve casing having a concave valve-seat on its lower end communicating with the supply pipe and the casing and connected to the storage tank, a buoyant body supported in the casing of less diameter than the casing and having a rod extending therefrom and through said seat,

said rod being of less diameter than the seat, and a downwardly convex valve surrounding the rod and depending from the body and adapted to fit the seat, whereby the buoyant body may tip without unseating the valve.

In testimony whereof I hereunto aifix my signature in the presence of two witnesses.

I ALVA A. CUMLMINGS.

Witnesses:

CLARENCE C. REID, FRED BELL. 

